E5A - 富及第 烘干机

中文

含义

E5A 故障代码表示干衣机湿度传感器电路异常，控制系统无法检测滚筒内衣物的干燥程度。湿度传感器通常由安装在滚筒前部或风扇风道中的两根金属电极条组成，利用衣物与电极接触时的电阻变化来判断干湿度。此故障会导致干衣机无法自动终止烘干程序，可能过度烘干或烘干不足。

常见原因

1. 湿度传感器金属电极表面覆盖绒毛或洗涤剂残留物，绝缘层阻隔了电极与衣物的电接触。
2. 传感器电极之间的绝缘支架碳化或漏电，导致基线电阻异常。
3. 传感器到主控板的连接线束断路或连接器松动。
4. 主控板湿度检测电路故障，无法正常采样或处理传感器信号。
5. 传感器电极本身腐蚀或磨损，有效感应面积减少。

自助排查

1. 断开电源，找到湿度传感器电极（通常位于滚筒前部开口处或风扇壳内），用细砂纸或百洁布轻轻打磨电极表面去除氧化层和积碳。
2. 用湿布擦拭电极表面及其绝缘支架，去除绒毛和洗涤剂残留物，然后彻底吹干。
3. 用万用表电阻档测量传感器两电极之间的电阻，干燥状态下应为无穷大（开路）；在电极间放置湿布应显示几十至几百 kΩ 的变化。
4. 检查传感器连接器是否插紧，针脚有无氧化或弯曲，清洁后重新连接。
5. 启动不带衣物烘干预热程序，用万用表监测传感器接口电压是否在 5V 左右变化；若始终无变化则主控板可能故障。

English

Meaning

Error code E5A indicates a moisture sensor circuit fault — the control board cannot determine the dryness level of the clothes inside the drum. The moisture sensor typically consists of two metal electrode bars mounted at the front of the drum or inside the blower housing, detecting conductivity changes when wet clothing contacts them. This fault prevents the dryer from automatically ending the cycle at the correct dryness level, potentially resulting in over-drying or under-drying.

Common Causes

1. Moisture sensor electrode surfaces coated with lint or detergent residue, creating an insulating barrier that blocks electrical contact with wet clothing.
2. Insulating spacer between the sensor electrodes carbonized or leaking current, causing abnormal baseline resistance.
3. Sensor wiring harness broken or connector loose between the electrode assembly and the main control board.
4. Main control board moisture detection circuit failed, unable to sample or process the sensor signal properly.
5. Sensor electrodes corroded or worn, reducing the effective sensing area and sensitivity.

Self-Check Steps

1. Disconnect power, locate the moisture sensor electrodes (typically near the front drum opening or inside the blower housing), and gently polish the electrode surfaces with fine-grit sandpaper or a scouring pad to remove oxidation and carbon buildup.
2. Wipe the electrodes and the insulating spacer with a damp cloth to remove lint and detergent residue, then dry thoroughly.
3. Measure resistance between the two sensor electrodes with a multimeter — dry state should show infinity (open circuit); placing a damp cloth across the electrodes should produce a reading in the tens to hundreds of kΩ range.
4. Check that the sensor connector is fully seated and the pins are free of oxidation or bending; clean and reseat the connector.
5. Run an unloaded drying preheat cycle while monitoring the voltage at the sensor interface — it should fluctuate around 5V DC as the control board samples; no fluctuation suggests a control board fault.